Annual report pursuant to Section 13 and 15(d)

Long-Term Debt and Other Financings - Aggregate Future Principal and Final Fee Payments of Interest Bearing Obligations (Details)

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Long-Term Debt and Other Financings - Aggregate Future Principal and Final Fee Payments of Interest Bearing Obligations (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Aggregate future principal and final fee payments of total interest bearing obligations - long-term [Abstract]    
2017 $ 19,215  
2018 11,907  
2020 15,981  
Long-term debt including current portion, interest, final payment fee, discount and issuance cost 47,103  
Less: Interest, final payment fee, discount and issuance cost (3,936)  
Long-term debt including current portion 43,167 $ 48,667
Less: interest bearing obligations – current (17,855) (5,910)
Interest bearing obligations – non-current $ 25,312 $ 42,757